/*
 * LibrePCB - Professional EDA for everyone!
 * Copyright (C) 2013 LibrePCB Developers, see AUTHORS.md for contributors.
 * https://librepcb.org/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef LIBREPCB_EDITOR_PROJECTEDITOR_H
#define LIBREPCB_EDITOR_PROJECTEDITOR_H

/*******************************************************************************
 *  Includes
 ******************************************************************************/
#include <librepcb/core/attribute/attributeprovider.h>
#include <librepcb/core/rulecheck/rulecheckmessage.h>
#include <librepcb/core/serialization/fileformatmigration.h>
#include <optional/tl/optional.hpp>

#include <QtCore>

#include <memory>

/*******************************************************************************
 *  Namespace / Forward Declarations
 ******************************************************************************/

class QMainWindow;

namespace librepcb {

class Board;
class FilePath;
class LengthUnit;
class NetSignal;
class Project;
class Workspace;

namespace editor {

class BoardEditor;
class SchematicEditor;
class UndoStack;

/*******************************************************************************
 *  Class ProjectEditor
 ******************************************************************************/

/**
 * @brief The ProjectEditor class
 */
class ProjectEditor final : public QObject {
  Q_OBJECT

public:
  // Constructors / Destructor
  ProjectEditor() = delete;
  ProjectEditor(const Project& other) = delete;

  /**
   * @brief The constructor
   */
  ProjectEditor(
      Workspace& workspace, Project& project,
      const tl::optional<QList<FileFormatMigration::Message>>& upgradeMessages);

  /**
   * @brief The destructor
   */
  ~ProjectEditor() noexcept;

  // Getters: General

  Workspace& getWorkspace() const noexcept { return mWorkspace; }
  Project& getProject() const noexcept { return mProject; }
  const LengthUnit& getDefaultLengthUnit() const noexcept;

  /**
   * @brief Get a reference to the undo stack of the project
   *
   * @return A reference to the UndoStack object
   */
  UndoStack& getUndoStack() const noexcept { return *mUndoStack; }

  // General Methods

  /**
   * @brief Abort any active (blocking) tools in other editors
   *
   * If an undo command group is already active while starting a new tool, try
   * to abort any active tool in other editors since it is annoying to block
   * one editor by another editor (an error message would appear). However, do
   * NOT abort tools in the own editor since this could lead to
   * unexpected/wrong behavior (e.g. recursion)!
   *
   * @param editor  The calling editor, which will not be aborted.
   */
  void abortBlockingToolsInOtherEditors(QWidget* editor) noexcept;

  /**
   * @brief Inform the editor that a project related window is about to close
   *
   * The project must be closed and destroyed automatically after the last
   * opened window of the project is closed, because without a window the user
   * is no longer able to close the project himself. So, every project related
   * window have to "ask" the ::librepcb::editor::ProjectEditor object
   * whether it is allowed to close or not. If the last opened window wants to
   * close, the editor will first ask the user if unsaved changes should be
   * written to the harddisc. Only if the user accepts this question and the
   * project is saved successfully, the method will return true to allow the
   * last window to close. Then it will also close the whole project.
   *
   * @param window    A reference to the window which is about to close
   *
   * @return true if the window can be closed, false if closing the window is
   * denied
   */
  bool windowIsAboutToClose(QMainWindow& window) noexcept;

  // Operator Overloadings
  ProjectEditor& operator=(const Project& rhs) = delete;

public slots:

  /**
   * @brief Open the schematic and/or the board editor window
   *
   * Which editors this will open depends on whether the project has schematics
   * and/or boards. If there aren't any boards or schematics, the schematic
   * editor will be shown anyway (otherwise the whole project editor would be
   * invisible).
   */
  void showAllRequiredEditors() noexcept;

  /**
   * @brief Open the schematic editor window and bring it to the front
   */
  void showSchematicEditor() noexcept;

  /**
   * @brief Open the board editor window and bring it to the front
   */
  void showBoardEditor() noexcept;

  /**
   * @brief Execute the *.lppz export dialog (blocking!)
   *
   * @param parent    parent widget of the dialog (optional)
   */
  void execLppzExportDialog(QWidget* parent = nullptr) noexcept;

  /**
   * @brief Execute the PCB order dialog (blocking!)
   *
   * @param parent    Parent widget of the dialog (optional)
   */
  void execOrderPcbDialog(QWidget* parent = nullptr) noexcept;

  /**
   * @brief Save the whole project to the harddisc
   *
   * @note The whole save procedere is described in @ref doc_project_save.
   *
   * @return true on success, false on failure
   */
  bool saveProject() noexcept;

  /**
   * @brief Make a automatic backup of the project (save to temporary files)
   *
   * @note The whole save procedere is described in @ref doc_project_save.
   *
   * @return true on success, false on failure
   */
  bool autosaveProject() noexcept;

  /**
   * @brief Close the project (this will destroy this object!)
   *
   * If there are unsaved changes to the project, this method will ask the user
   * whether the changes should be saved or not. If the user clicks on "cancel"
   * or the project could not be saved successfully, this method will return
   * false. If there was no such error, this method will call
   * QObject::deleteLater() which means that this object will be deleted in the
   * Qt's event loop.
   *
   * @warning This method can be called both from within this class and from
   *          outside this class (for example from the control panel). But
   *          if you call this method from outside this class, you may have
   *          to delete the object yourself afterwards! In special cases,
   *          the deleteLater() mechanism could lead in fatal errors
   *          otherwise!
   *
   * @param askForSave    If true and there are unsaved changes, this method
   * shows a message box to ask whether the project should be saved or not. If
   * false, the project will NOT be saved.
   * @param msgBoxParent  Here you can specify a parent window for the message
   * box
   *
   * @return true on success (project closed), false on failure (project stays
   * open)
   */
  bool closeAndDestroy(bool askForSave, QWidget* msgBoxParent = 0) noexcept;

  /**
   * @brief Set the flag that manual modifications (no undo stack) are made
   */
  void setManualModificationsMade() noexcept {
    mManualModificationsMade = true;
  }

  /**
   * @brief Approve/unapprove an ERC message
   *
   * @param msg       The message to modify
   * @param approve   The new approval state
   */
  void setErcMessageApproved(const RuleCheckMessage& msg,
                             bool approve) noexcept;

  std::shared_ptr<const QSet<const NetSignal*>> getHighlightedNetSignals() const
      noexcept {
    return mHighlightedNetSignals;
  }
  void setHighlightedNetSignals(
      const QSet<const NetSignal*>& netSignals) noexcept;
  void clearHighlightedNetSignals() noexcept;

signals:
  void ercFinished(const RuleCheckMessageList& messages);
  void highlightedNetSignalsChanged();
  void projectAboutToBeSaved();
  void projectSavedToDisk();
  void showControlPanelClicked();
  void openProjectLibraryUpdaterClicked(const FilePath& fp);
  void projectEditorClosed();

private:  // Methods
  void runErc() noexcept;
  void saveErcMessageApprovals(const QSet<SExpression>& approvals) noexcept;
  int getCountOfVisibleEditorWindows() const noexcept;

private:  // Data
  Workspace& mWorkspace;
  Project& mProject;

  /// The timer for the periodically automatic saving
  /// functionality (see also @ref doc_project_save)
  QTimer mAutoSaveTimer;

  QSet<SExpression> mSupportedErcApprovals;
  QSet<SExpression> mDisappearedErcApprovals;
  RuleCheckMessageList mErcMessages;

  std::shared_ptr<QSet<const NetSignal*>> mHighlightedNetSignals;

  UndoStack* mUndoStack;  ///< See @ref doc_project_undostack
  SchematicEditor* mSchematicEditor;  ///< The schematic editor (GUI)
  BoardEditor* mBoardEditor;  ///< The board editor (GUI)

  /// The UndoStack state ID of the last successful project (auto)save
  uint mLastAutosaveStateId;

  /// Modifications bypassing the undo stack
  bool mManualModificationsMade;
};

/*******************************************************************************
 *  End of File
 ******************************************************************************/

}  // namespace editor
}  // namespace librepcb

#endif
